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Mpg difference in the am / pm drive

Discussion in 'Gen 3 Prius Fuel Economy' started by Sperez201, Aug 19, 2013.

  1. Sperez201

    Sperez201 Junior Member

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    I drive 81 miles per day (home to work to home) I take on the 605 north to the 10 east on the way to work / and the 60 south to the 57 south to the 22 west to the 405 north back to my place ( in Los Angeles). My drive to work is averaging about 45 mpg but the drive home is about 56mpg. The drive back home is about 3 miles longer than the morning commute. Both passes thru hilly and upward sections of Los Angeles (to anybody whose familiar with the freeways I've mentioned). I cannot figure out why the difference in mpg. I'm on the road about 6am and leave work about 330pm. An thoughts on this issue.
     
    #1 Sperez201, Aug 19, 2013
  2. jnet

    jnet Member

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    am temperature should be cooler than pm. Also check the difference in elevation between your home and office. My GPS gives me the elevation when I do a "Where AM I"
     
    #2 jnet, Aug 19, 2013
  3. DomoDriver

    DomoDriver Junior Member

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    I routinely get in the 80's-90's on my way to work, but my absolute record coming home is 53.8. That's because I work downhill from my house.

    Is there an elevation change between your work and home?
     
    #3 DomoDriver, Aug 22, 2013
  4. bisco

    bisco cookie crumbler

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    prevailing wind.
     
    #4 bisco, Aug 22, 2013
  5. fotomoto

    fotomoto Senior Member

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    [​IMG]



    :)
     
    #5 fotomoto, Aug 22, 2013
    jnet likes this.
  6. SharonP

    SharonP Junior Member

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    57 south to the 22 is mostly downhill, after the initial climb into Diamond Bar. The 605 to the 60 has a more gradual elevation rise, but it's still uphill. That area get pretty windy as well, is the wind at your back or are you driving into it?
     
    #6 SharonP, Sep 5, 2013
  7. GSW

    GSW PRIUS POWER

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    Thats what happens to me, 58-60 mpg with a tail wind. Especially with
    a cold front passage.
     
    #7 GSW, Sep 5, 2013
  8. mmmodem

    mmmodem Senior Taste Tester

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    Yup, going with the elevation change. I drive uphill to work and get 60-70 mpg. Going home, I get 80-90 mpg. Even a slight change makes a difference.
     
    #8 mmmodem, Sep 5, 2013
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